| Patents for E21D 23 - Mine roof supports for step-by-step movement, e.g. in combination with provisions for shifting of conveyers, mining machines, or guides therefor (3,544) |
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| 08/10/2011 | CN101793158B Semi-unload alternately push type razor-thin coal seam hydraulic support |
| 08/10/2011 | CN101196119B Hydraulic support cap |
| 08/03/2011 | CN201915983U 液压支架 Hydraulic Support |
| 08/03/2011 | CN201915982U 一种采煤工作面掩护支架 One kind of Coal Face Shield Support |
| 08/03/2011 | CN201915981U Transitional support for large-mining-height working surface for full-mechanized coal mining |
| 08/03/2011 | CN201915980U 一种掘进巷道临时支护装置 A temporary roadway excavation support system |
| 08/03/2011 | CN201915979U 具备顶梁下俯角限位保护装置的液压支架 Hydraulic support beams under the roof with depression limit protection device |
| 08/03/2011 | CN201915978U Anti-rotating device of hydraulic support side guard board |
| 08/03/2011 | CN201915975U 一种插装式大流量硬密封换向阀 A large flow-mounted hard seal valve plug |
| 07/27/2011 | CN201908672U Head board automatically adapting to shape of roadway roof for temporary supporting machine |
| 07/27/2011 | CN201908671U Split side protection device suitable for transition bracket between fully mechanized coal mining working surface and large coal mining high working surface |
| 07/27/2011 | CN1948715B Supply line |
| 07/27/2011 | CN102135006A Automatic tamper type waste filling hydraulic support |
| 07/21/2011 | WO2011039693A3 Advancing assembly and powered shield support herewith |
| 07/20/2011 | CN201903646U Coal cutter position detection device |
| 07/20/2011 | CN201902223U Hydraulic swing link type top caving coal hydraulic support |
| 07/20/2011 | CN201902222U Double-pushing and double-guide hydraulic swinging rod type combined bracket |
| 07/20/2011 | CN201902221U Pin shaft assembly for connector of hydraulic support pushing mechanism |
| 07/20/2011 | CN201902220U Light end bracket |
| 07/20/2011 | CN102128042A Hydraulic support electronic control system |
| 07/20/2011 | CN102128041A Bottom uplifting device for hydraulic support and hydraulic support |
| 07/20/2011 | CN102128040A Hydraulic striding-type advanced-support equipment |
| 07/13/2011 | CN102121390A Telescopic tunneling immediate support device |
| 07/12/2011 | DE202009015653U1 Schildkappe für einen Schildausbau Shield cap for a shield support |
| 07/06/2011 | CN201891426U Position detection module for coal mining machine |
| 07/06/2011 | CN201891425U Novel push rod |
| 07/06/2011 | CN201891424U Hydraulic support with support adjusting jack |
| 07/06/2011 | CN201891423U End head hydraulic bracket and single hydraulic brackets for same |
| 07/06/2011 | CN201891422U Hydraulic support with waste rock blocking plate |
| 07/06/2011 | CN102116165A Hydraulic support control device of coal mine and distributed control system thereof |
| 07/06/2011 | CN102116164A Temporary supporting device for roadway drifting |
| 07/06/2011 | CN102116163A Vertical hydraulic bracket |
| 07/06/2011 | CN102116155A Method for supporting and coalmining in transition section of large-mining-height working face |
| 07/06/2011 | CN101644162B Self-circulation type advanced hydraulic support |
| 07/06/2011 | CN101139932B Construction shield for underground mining |
| 06/29/2011 | CN201884043U Electric control device for hydraulic support |
| 06/29/2011 | CN201884042U High-gassy fully mechanized top coal-caving mining facility |
| 06/29/2011 | CN201884041U Stereoscopic hydraulic support |
| 06/29/2011 | CN201884040U Base lifting mechanism for hydraulic support in thin coal seam |
| 06/29/2011 | CN102108875A Single-stage side protective device applicable to high working surface transition support in mechanized mining and deep mining of coal |
| 06/29/2011 | CN101418694B Composite slope guarding hydraulic support and use thereof |
| 06/29/2011 | CN101338684B Combined guided slipping type forepoling hydraulic support |
| 06/22/2011 | CN201876728U Digitized and unmanned full-mechanized mining face control system |
| 06/22/2011 | CN201874598U Shield type hydraulic support for thin coal seam |
| 06/22/2011 | CN201874597U Tetrastyle paste filling timbering hydraulic support used in thin coal seam |
| 06/22/2011 | CN201874596U Roadheader-borne hydraulic multifunctional temporary supporting machine |
| 06/22/2011 | CN102102525A Hydraulic support and pedal plate device thereof |
| 06/16/2011 | US20110142551 Shield cap for a shield-type mining support |
| 06/15/2011 | CN201865682U Automatic unloading device capable of preventing hydraulic bracket from self-descending |
| 06/15/2011 | CN201865678U Integral in-position mounting and return device for underground hydraulic support |
| 06/15/2011 | CN201865676U Liquid return shutoff valve |
| 06/15/2011 | CN102094665A Auxiliary support method for additional load during approaching construction of porous tunnel by shield method |
| 06/15/2011 | CN102094664A Hydraulic bracket for end of comprehensive mechanized filling coal face |
| 06/15/2011 | CN102094663A Machine-mounted multifunctional cantilever supporting machine |
| 06/15/2011 | CN102094647A Safe and efficient fully-mechanized mining method for thin coal seam under two hard conditions |
| 06/15/2011 | CN101560885B Portable manual hydraulic support |
| 06/08/2011 | CN201857985U Sliding roof beam advance timbering support |
| 06/08/2011 | CN201857975U Supported comprehensive tunnel boring machine |
| 06/08/2011 | CN102086772A Hydraulic support and bottom lifting device thereof |
| 06/08/2011 | CN102086771A Filling template bracket |
| 06/03/2011 | WO2011064690A2 Shield canopy for a shield-type support |
| 06/01/2011 | CN201851142U Large-tilt-angle hydraulic support |
| 06/01/2011 | CN201851141U Novel stack type hydraulic support |
| 06/01/2011 | CN201851140U Three-level protective net device for hydraulic support |
| 06/01/2011 | CN201851135U Novel valve protection device of fully mechanized mining support |
| 06/01/2011 | CN102080565A Bracket spraying dust fall device used for fully mechanized caving coal mine working face |
| 06/01/2011 | CN102080557A Split type side guard device applicable for transition support of large coal mining height fully-mechanized face |
| 06/01/2011 | CN102080556A Transitional bracket for mechanized large mining height working face of coal |
| 06/01/2011 | CN102080555A Double-stage side guard device applicable to transition support of large coal mining height fully-mechanized face |
| 06/01/2011 | CN101457645B Thick coal seam stepwise full-seam coal mining method |
| 05/25/2011 | CN102071957A Controller of mine-used intrinsic safety type hydraulic support electrohydraulic control device |
| 05/25/2011 | CN102071956A Electro-hydraulic control system for working surface hydraulic support |
| 05/25/2011 | CN101666230B Coal mining method of lengthened front-beam fully-mechanized mining and fully-mechanized top coal carving of three-soft coal seam and equipment |
| 05/18/2011 | EP2156017B1 Shield control device for carrying out the longwall function of a longwall unit in the longwall face working in a mine |
| 05/18/2011 | CN201836131U Oil tank of caterpillar walking type hydraulic support |
| 05/18/2011 | CN201835852U Self-advancing air-bag support |
| 05/18/2011 | CN201835851U Coal face end timbering, filling and transshipping system |
| 05/18/2011 | CN201835850U On-board temporary supporting device for development machine |
| 05/18/2011 | CN201835849U Waste rock baffling guard mesh device for hydraulic support |
| 05/18/2011 | CN201835831U Digging and conveying fully-mechanized mining unit for high-pitch long-wall working face |
| 05/18/2011 | CN101571051B Traction sliding hydraulic support system |
| 05/18/2011 | CN101560884B Pull-type suspension hydraulic support system |
| 05/11/2011 | CN201826879U Manual pilot adjacent frame control system |
| 05/11/2011 | CN201826878U Underground remote-control pulley type shield support in mine |
| 05/11/2011 | CN201826877U Integral top beam combined suspension bracket provided with upright pillar protector |
| 05/11/2011 | CN201826876U Underground remote-control shield support used in delta region in mine |
| 05/11/2011 | CN201826875U Special transport vehicle for coal mine supports |
| 05/11/2011 | CN201826866U Connection locating device |
| 05/11/2011 | CN201826863U Fully mechanized mining hydraulic support device capable of abdicating and buffering |
| 05/11/2011 | CN102052360A Shuttle valve |
| 05/11/2011 | CN102052084A Remote-controlled pulley-type shielding bracket under coal mine |
| 05/04/2011 | EP2315916A1 Shield cap for a shield-type mining support |
| 05/04/2011 | CN102042435A Electromagnetic pilot valve driver |
| 05/04/2011 | CN102042025A Pushing regulating mechanism |
| 05/04/2011 | CN102042024A Advance support bracket for sliding top beam |
| 05/04/2011 | CN102042023A Hydraulic support with filling and leakage-preventing function |
| 05/04/2011 | CN102041972A Method and system for dismounting press support |
| 05/04/2011 | CN101260810B Hydraulic support tail beam |
| 05/04/2011 | CN101240710B Support moving device |
| 04/27/2011 | CN201810330U Alternating current (AC) variable-frequency servo system control device of hydraulic support |